This linear charge management MCP73828-4.1VUA charge controller from Microchip Technology will keep your battery safe by monitoring the state of the battery, calculating data, and optimizing the performance. With an output that has a voltage of 4.1 V, this is power management at its best. This battery gauge has a minimum operating temperature of -20 °C and a maximum of 85 °C. This device runs on Li-Ion. This device has a minimum operating supply voltage of 4.5 V and a maximum of 5.5 V.